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Exploring Darwin's Principles: Evolution, Inheritance, and Extinction

This unit delves into Charles Darwin's groundbreaking ideas on evolution, focusing on key concepts such as natural selection, the struggle for survival, inheritance, and variability. It examines practical examples, including Darwin's experiments with plant varieties and observations on wildlife. The unit discusses the factors contributing to extinction and the impact of human activities on biodiversity today. Through these explorations, students will gain a profound understanding of Darwin's theories and their relevance to contemporary ecological issues.

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Exploring Darwin's Principles: Evolution, Inheritance, and Extinction

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  1. Unit 1 Darwin’s big ideas and ways of working Darwin’s big ideas and ways of working: Unit 1 Darwin’s big ideas and ways of working: Unit 1

  2. High ratio of increase and Struggle for life Darwin’s weed patch experiment Darwin’s big ideas and ways of working: Unit 1 Darwin’s big ideas and ways of working: Unit 1

  3. Eggs or very young animals seem generally to suffer most because they are competing with established organisms High ratio of increase and Struggle for life http://www.arkive.org/common-frog/rana-temporaria/image-A8918.html http://www.arkive.org/robin/erithacus-rubecula/image-A9289.html Darwin’s big ideas and ways of working: Unit 1

  4. Inheritance and variability Pollination - bees transfer pollen and pollen carries the potential for variability in plants Darwin’s big ideas and ways of working: Unit 1

  5. Darwin grew 54 varieties of the Cabbage family in his kitchen garden Inheritance and variability Darwin’s big ideas and ways of working: Unit 1

  6. Making Connections What is the connection between these organisms? Bumble bee Red clover Cats Field Mouse Darwin’s big ideas and ways of working: Unit 1

  7. Darwin made collections and noticed the variability amongst the individuals he collected Inheritance and variability Darwin’s big ideas and ways of working: Unit 1

  8. Life Cycles Seed to seed Some don’t survive even in a pod Darwin’s big ideas and ways of working: Unit 1

  9. Divergence of Character List 5 ways in which dogs show divergence of character. Darwin’s big ideas and ways of working: Unit 1

  10. Creating Models Darwin’s big ideas and ways of working: Unit 1

  11. Extinction of less-improved forms • ‘the same genera and species [of fossil plants] are found in the most remote regions where the plants now in existence are entirely different.’ • (Darwin’s notebook on the transmutation of species) • Endangered species appear on the Red List e.g. Wild horse • http://www.arkive.org/przewalskis-horse/equus-ferus-przewalskii/description.html Darwin’s big ideas and ways of working: Unit 1

  12. Extinction of wildlife occurs today because of: • Habitat degradation – clearing for housing/roads/mining • Human activities including hunting • Competition with domestic livestock/crops • Global warming • Flooding • Pollution – air, water, soil Darwin’s big ideas and ways of working: Unit 1

  13. Darwin’s big ideas and ways of working: Unit 1

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